Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-26T04:37:26.152Z Has data issue: false hasContentIssue false
  • English
  • Français

Electric current diagnostics in the magnetosphere of neutron stars

Published online by Cambridge University Press:  20 March 2013

Alexander V. Stepanov  and
Valery V. Zaitsev
Alexander V. Stepanov
Affiliation:
Pulkovo Observatory, Pulkovo chaussee 65, Saint Petersburg 196140, Russia email: [email protected]
Valery V. Zaitsev
Affiliation:
Institute of Applied Physics, Ulianova str. 46, Nizhny Novgorod 603950, Russia email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Active neutron stars – SGRs, reveal the high-quality QPOs at the ‘pulsating tail’ phase. We suggest diagnostics of the trapped fireball plasma, the source of high-frequency pulsations, using coronal seismology. The trapped fireball is represented as a set of current-carrying loops - equivalent of electric circuits. Our approach gives the following magnetosphere parameters in SGRs: an electric current of (2−8) × 1019 A, magnetic field of (0.6−2.7) × 1013 G, and electrons density of (1.3−6.0) × 1016 cm−3. We show high-frequency QPOs can be self-excited for a smaller electric current than the maximum current and/or due to the parametric resonance.

Keywords

Stars: neutronSGRsflaresoscillationscurrent-carrying loopsdiagnostics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 505 - 507
Copyright
Copyright © International Astronomical Union 2013

References

Alfven, H. & Carlqvist, P. 1967, Solar Phys, 1, 220CrossRefGoogle Scholar
Barat, S., Hayles, R. I., & Hurley, K.et al. 1983, A&A, 126, 400Google Scholar
Beloborodov, A. M. & Thompson, C. 2007, ApJ, 657, 967CrossRefGoogle Scholar
Levin, Yu. 2007, MNRAS, 377, 159CrossRefGoogle Scholar
Stepanov, A. V., Zaitsev, V. V., & Nakariakov, V. M. 2012, Coronal Seismology. Waves and Oscillations in Stellar Coronae (Wiley-VCH Verlag & Co), 221CrossRefGoogle Scholar
Strohmayer, T. E., Watts, A. L. 2006, ApJ, 653, 593Google Scholar
Zaitsev, V. V., Kislyakov, A. G., & Shkelev, E. I. 2001, Radiophys. Quantum Electron., 44, 756Google Scholar